Is really hard to maintain a good ISO performance AND sharpness on a 24MP APS-C sensor.

Imho these things have nothing to do with each other, unless the manufacturer decides to hide iso noise problems with forced noise reduction resulting in a sharpness loss - other than that iso performance is just a sensor feature, and so far Canon doesn't have the edge on the competition.

Sharpness can be impaired by a strong aa filter against moire (like on the 5d3), but mostly it's dependent on the lens - and starting with 24mp many people with cheaper or older lenses will be up for a disappointment because their lens is outresolved by the sensor, for example my 17-40L wouldn't take much more than 18mp on aps-c.

...That I'm afraid. If Canon decide to use THE SAME 10 years old technology to make the sensor, than the only way to improve the ISO performance is to use forced noise reduction soft, and that will result in lots of sharpen loss.

Is really hard to maintain a good ISO performance AND sharpness on a 24MP APS-C sensor.

Imho these things have nothing to do with each other, unless the manufacturer decides to hide iso noise problems with forced noise reduction resulting in a sharpness loss - other than that iso performance is just a sensor feature, and so far Canon doesn't have the edge on the competition.

Sharpness can be impaired by a strong aa filter against moire (like on the 5d3), but mostly it's dependent on the lens - and starting with 24mp many people with cheaper or older lenses will be up for a disappointment because their lens is outresolved by the sensor, for example my 17-40L wouldn't take much more than 18mp on aps-c.

Ironically, a sensor that outresolves the lens is the ideal alternative INSTEAD of having an AA filter. The AA filter simply blurs high frequencies that can't be meaningfully resolved. If the sensor always outresolves the lens, then the AA filter is moot, and you should always be able to resolve more detail, even if the lens can't match the sensor...without EVER having to worry about aliasing of any kind.

What strikes me odd is if Canon makes this camera, it would mean their highest MP camera would be an APS-C format body, not full frame. That just doesn't sound logical, why would they do that? This camera would have a pixel density equal to a 61mp full frame camera, that is far beyond the resolving power of most lenses. I doubt this camera would really come anywhere close to the IQ of the 5DmkIII, that is just wishful thinking, at any ISO.

I think both of you guys are greatly underestimating the resolving power of Canon's new Mark II generation of lenses. According to my experiences renting many of them, they are unbelievably sharp...far sharper than necessary to completely resolve detail for the 18mp APS-C sensor. I wouldn't be surprised if they were good enough to resolve just enough detail for a 24mp APS-C (which, again, would be ideal from an AA filter standpoint...it wouldn't need to be all that strong), and plenty good enough for 40-50mp FF sensors.

If this spec list is even slightly right, count me in! I find the current 7D to be a brilliant general-purpose camera and this just seems to make it one notch better on all fronts.. Now let's wait for the actual image samples... this should be interesting.

Now that Canon has pocketed all of the cash from 5Dii to 5Diii upgraders, they can now start releasing cameras with their revolutionary next generation sensor. Can't wait to see the discussion when DXO give it an "83".

Whether I upgrade from my current 7D to the 7D II or to Fullframe mainly depends on:1. Sensor quality Needs to have minimum +2 EV Hi ISO AND DR .. atv ALL ISOs, including 100. in RAW. Do not care abaout ooc jpegAlso, I am perfectly fine with with 18MP on APS-C, do not need 24.2. AF systemthe closer to 1D-X the more likely I will take it :-) If it falls short on count 1 or 2. I will definitely not buy it.

At the rumoured price tag I would also expect:* FULLY functional Auto-ISO - exactly like in Nikon D800* Wifi, GPS built in - but not "always on"!* Pop-Up flash with optical wireless commander - as in 7D* additionally a built in Canon RT-radio transmitter .. that chip is probably only a few square millimeters. so fits easily alongside a pop up flash. It is not -... one or the other!* fps .. I do not need 10 ... 8 is plenty for me, I would even accept 6 if IQ would be improved * video .. don't ever use it, don't need it, don't want it. Buy a camcorder, canon makes nice ones.

IF I move to FF .. and Canon wants my money, it needs to be a 5D IV at the price of a Nikon D800, besting the Nikon's sensor in terms of DR.

Canon! you jerks! when will this company get with it and release a camera people will buy??? For years I'v wanted a camera that prints photos on small slices of cheese, so I can view my photos and hand them out as tasty snacks. Nikon has cameras that print on a huge cheese range [CR] edam in the highlights and coloured cheddar in the shadows.Canon, you are losing me as a customer....

This camera would have a pixel density equal to a 61mp full frame camera, that is far beyond the resolving power of most lenses.

Grrrrr....would people quit saying entirely wrong stuff like that please? First of all resolving power doesn't work like that. Second, even if it did the better lenses can already resolve up into the many hundreds of megapixels on full frame.

I think both of you guys are greatly underestimating the resolving power of Canon's new Mark II generation of lenses. According to my experiences renting many of them, they are unbelievably sharp...far sharper than necessary to completely resolve detail for the 18mp APS-C sensor. I wouldn't be surprised if they were good enough to resolve just enough detail for a 24mp APS-C (which, again, would be ideal from an AA filter standpoint...it wouldn't need to be all that strong), and plenty good enough for 40-50mp FF sensors.

What? The difference in resolving power between 18MP and 24MP is nothing - 15%. The gap between these lenses and the 18MP sensor is more like 200%.

[size=78%]You know I have been feeling kind of strange every since I replaced that nasty window on my microwave with a clear pane of glass. This may explain a lot.[/size]

Hmm, this reminded me, that recently, when I turn on our microwave oven, the kitchen transistor radio craps out... This event coincides with the oven timer moving at a factor 5 speed...No structural defects are visible, but I seem to recall something about a hole turning into an antenna at a certain size? Better get a new microwave (or maybe a 5D between the two... or maybe a fully shielded FM radio?) Sry bout the off topic..This thread has made me nervous for some odd reason

To make everybody happy canon would have to make a 1 000 000 megapixel camera with a medium format sensor that can use EF lenses and can manage noise free images at iso 2 000 000, and it should cost below 100$. But thats just not how it works.

I beleve the mk II will be a good supstitute for the 7D. And if it can deliver cleaner files at ISO 3200 i will buy one I love my 7D as a backup for the 5d mkIII